A 3-phase, 11kV, 10 MVA synchronous generator is connected to an inductive load of power factor  via a lossless line with a per-phase inductive reactance of . The per-phase synchronous reactance of the generator is  with negligible armature resistance. If the generator is producing the rated current at the rated voltage, then the power factor at the terminal of the generator is

A cylindrical rotor synchronous generator has steady state synchronous reactance of 0.7 pu and subtransient reactance of 0.2 pu. It is operating at (1 + j0) pu terminal voltage with an internal emf of (1 + j0.7) pu. Following a three-phase solid short circuit fault at the terminal of the generator, the magnitude of the subtransient internal emf (rounded off to 2 decimal places) is _____________ pu.

In relation to the synchronous machines, which one of the following statements is false?

Curves X and Y in Figure denote open circuit and full-load zero power factor (zpf) characteristics of asynchronous generator. Q is a point on the zpf characteristics at 1.0 p.u. voltage. The vertical distance PQ in Figure gives the voltage drop across

A three-phase, 50Hz, 415V, synchronous machine operates at rated voltage and at a leading power factor of 0.8. Shaft power is 15 kW and excitation emf is 400V. If per phase resistance is 0.5 ohm, find the synchronous reactance. Neglect mechanical losses of the system.